Upper Decker

The act of taking a dump in the tank of a toilet.
Step 1: Quietly sneak into the bathroom unseen
Step 2: Carefully remove the top of the tank. Note the porcelain tank top is very delicate and will shatter if dropped

Step 3: Climb on the toilet, drop pants and sit on the tank. Imagine you are a bird sat uptop your nest, sit very softly or else the tank may break and the operation will be compromised

Step 4: Take a monster shit. I'm talkin like a goddamn mudslide out your asshole

Step 5: Whipe and throw the tp in the tank too for good measure and put the top back on

Step 6: Return to the party and act like nothing ever happened, if you leave right away you will draw suspicion to yourself
Step 7: Enjoy the host's reaction when they see that Mount Vesuvius just exploded in their toilet tank

Friend: Yo did you hear, Julia is having a party this Saturday
Me: I dislike her very much, I'm gonna drop an Upper Decker at that party

by bowelsmovin June 25, 2017

dickless

ONe without having a male sex organ or one that lacks courage.

Cletus is DICKLESS because he doesn't want to step up to that hottie.

by fun-o-bunz August 13, 2003

upper decker

The act of defecating in the upper tank of the toilet. When the next poor unsuspecting person flushes the toilet they get a bowl of beef stew. the upper decker is a weapon of terror and should only be used on people who deserve it.

My friends x-girl friend had a party and she left whith some other dude who looked like the fonz "Heyyy!". So I took it upon myself to leave her an upper decker

by The Mad shitter May 14, 2003

double decker pussies

When one has two pussies stacked one atop the other, for easy alternating insertion. Usually done doggystyle, this position is used mostly in FFM (female-female-male) porn.

Did you see Ava Devine and Alica Saint in that new Peter North flick? He stacked their asses up into double decker pussies and fucked them both, man!

by loose_cannon November 18, 2006

Double Decker Nut

When you are jacking off while laying on your bed, quickly stand up on your bed before you're going to nut and aim at the floor.

Kid: When was the last time you nutted?
Kid 2: Yesterday. I tried the Double Decker Nut it was awesome!

by niganigga97 January 13, 2020

Decker Special

The act of performing cunnilingus on a woman who is also receiving missionary intercourse from a different male partner. This act is usually done without any prior agreement between the parties invlovled.

Dude, last night Brian tried to pull a Decker Special when I was railing Maria in the laundry room, I think he licked more wiener than puss.

by Sneaky Sneaky Sneaky February 22, 2011

Matt Decker

A commodore from Star Trek that went mad and lost his mind after he encountered a giant alien robot planet killer thing that ended up crippling his ship and killing his entire crew.

Finals week always makes me turn into Matt Decker.

The test Matt Deckered me.

That bitch was crazier then Matt Decker.

You look like Matt Decker; don't you know how to shave?

by CaptKirk April 29, 2010